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Delta Max is one of those “amazing when it works” devices. But on Windows, a lot of people get stuck on the same confusing thing:
- Do I need a driver?
- Why is “Macrosilicon USB Display” running?
- Why is the upper screen blank / flickering / not detected?
UPERFECT’s own Delta-series help pages focus on killing the “Macrosilicon USB Display” process, verifying the driver is loaded in Device Manager, and pointing Windows to the default driver folder.
And real-world reviews of Delta Max also highlight that setup can be less “single cable magic” and more “right ports + right cables + right mode.”
This guide is built to answer what people actually search in 2026:
- “UPERFECT Delta Max driver needed?”
- “Macrosilicon USB Display high CPU”
- “upper screen not showing”
- “USBDISPLAY disk missing”
- “msusb video yellow triangle”
The 10-second answer: do you need the driver?
Most Windows users do NOT need a driver if you’re using true video output
If your laptop’s USB-C supports DP Alt Mode (video over USB-C), Windows should treat Delta Max like a normal monitor. DP Alt Mode is basically “GPU video out over USB-C.”
You DO need a driver if you’re using “USB display mode”
https://www.techradar.com/computing/uperfect-delta-max-touch-portable-monitor-reviewThat’s the mode where Windows uses a USB graphics solution and you’ll see things like:
- “Macrosilicon USB Display” running in Task Manager
- USB Video / msusb video entries in Device Manager that need a driver update
Why “Macrosilicon USB Display” exists (in plain English)
Some Delta-series setups use a USB display chipset + software layer to get extra screen functionality over USB. UPERFECT explicitly tells Windows users to check that the “Macrosilicon USB Display” process is running, and if it’s missing, it usually means the driver didn’t install or didn’t start correctly.
Delta Max setup reality (what bloggers often skip)
Tech reviews note Delta Max can require multiple cables to get two truly independent screens reliably (not just mirroring).
UPERFECT’s own guidance across manuals/FAQs also emphasizes:
- USB-C must support DP Alt Mode for video
- Power matters (insufficient wattage can cause flicker/black screens)
- Wrong / weak cables cause “no signal” and instability
Quick “mode check” table (save this)
| What you’re doing | What you’ll see on Windows | Driver needed? | Most common fix |
|---|---|---|---|
| USB-C video (DP Alt Mode) | Displays show up like normal monitors | No | Use the right USB-C port/cable, add external power |
| HDMI(s) + USB power | Normal monitor behavior, but may need USB cable for certain functions | Usually No | Ensure the right HDMI goes to the right screen; add USB/power as required |
| USB “display” mode | “Macrosilicon USB Display” process; USB Video / msusb video device | Yes | Install/repair driver; update via Device Manager to the Win USB Display folder |
The fastest fix order (Windows, Delta Max / Delta series)
Step 1 — Kill the stuck process (30 seconds)
- Press Ctrl + Shift + Esc → Task Manager
- Find “Macrosilicon USB Display” → End task
- Unplug the Delta Max USB connection → plug back in
Why this works: UPERFECT uses this exact method to reload the driver/disk on Windows.
Step 2 — Force the “USBDISPLAY” disk to reappear (1 minute)
Some models expose a removable disk named USBDISPLAY when the driver/disk reloads. UPERFECT’s FAQ says to end the process, reconnect, and wait a few seconds for the disk to mount.
If you see the disk, open it and look for a Windows installer (the exact version can differ by model). One UPERFECT guide shows an example file like USBDisplay_Windows_V3.1.x on the device disk.
Step 3 — Fix “USB Video” / yellow triangle in Device Manager (2–3 minutes)
UPERFECT’s Delta help article says:
- Open Device Manager
- Find USB Video
- Right-click → Update driver
- Choose manual/browse and point Windows to:
C:\Program Files\Win USB Display(default path)
That single path is one of the biggest “missing details” in most blogs.
Step 4 — Confirm the virtual graphics device exists (30 seconds)
UPERFECT also tells Windows users to check whether “MS Idd Device” virtual graphics exists in Device Manager for correct status.
If it’s missing after reinstalling, do a full restart and reconnect.
Step 5 — If Windows 11 is fighting you (advanced, still simple)
A Windows 11 community thread reports cases where winUSBdisplay v4.1.xx appears as msusb video with a warning icon and doesn’t initialize properly.
If you’re in that situation:
- Try the UPERFECT “Update driver → browse to Win USB Display folder” method first (it’s the cleanest).
- If that fails, uninstall the device in Device Manager and reinstall using the same folder path (then reboot).
The “this is not a driver problem” checklist (but looks like one)
Before you reinstall anything, check these 3 high-impact causes:
- Your USB-C port is not video-capable
Not all USB-C ports support DP Alt Mode. If it only charges, you’ll get “no signal.” - Power is too weak
UPERFECT’s troubleshooting guide warns insufficient wattage can cause flicker, shutdown, or unstable performance (they note cases where “45W required” but weak chargers behave like 30W). - Cable quality / spec mismatch
Wrong or low-quality cables can cause “no signal” and random dropouts.
Mini “chart”: Fix ladder by time (typical)
| Fix | Typical time | Success rate (in real life) |
|---|---|---|
| End “Macrosilicon USB Display” + reconnect | 1 min | High |
| Update driver → browse to Win USB Display folder | 3 min | High |
| Reinstall driver + reboot | 7–10 min | Medium–High |
| Cable/port/power correction | 2–5 min | High |
(Time is a practical estimate, not lab-measured.)
Driver safety in 2026: download smart, not desperate
Drivers are a common place people get burned by shady “driver updater” sites.
Windows relies on digital signatures to verify driver package integrity and vendor identity.
If you’re ever unsure:
- Check the driver package signature (Microsoft documents how to validate signatures via the driver catalog file properties).
- Prefer official UPERFECT Help Center downloads and the built-in device disk when available.
Remote work setup tips (Delta Max on a Windows laptop)
Delta Max is built for office productivity (stacked screens, minimal desk footprint). Reviews note it’s best suited for office work once configured, even if setup can be finicky.
My “stable workday” settings:
- Set both screens to 60Hz first (then raise later if stable)
- Keep brightness moderate if you’re bus-powered
- Disable aggressive USB power saving on your laptop if you see random disconnects
- Always power the monitor externally for long sessions (especially on travel setups)
FAQs
Q1: Do I need a driver for UPERFECT Delta Max on Windows 11?
If you’re using DP Alt Mode/HDMI like a normal monitor, usually no. If you see “Macrosilicon USB Display” or USB Video devices, yes.
Q2: What does “Macrosilicon USB Display” mean?
It’s the background process used by the USB display driver stack in certain Delta-series modes. UPERFECT tells Windows users to verify it’s running or restart it.
Q3: My upper screen is blank. Is that a driver problem?
Often yes. UPERFECT’s Delta help guide says upper-screen issues are typically driver related and shows how to confirm the process and driver status.
Q4: Where is the Win USB Display driver folder on Windows?
UPERFECT lists the default path as C:\Program Files\Win USB Display for manual driver updates.
Q5: Why does it work then fail after sleep?
Multi-cable and power stability matter a lot on stacked dual monitors, and some users report glitchy wake behavior. Keeping external power connected reduces flicker/dropouts
