Windows 10: Error with monitor on Windows 10

Good night everyone.

First of all, I'm sorry about my bad english, but I need some help. A friend tried to install new windows 10 and had some troubles with his monitor. It didn't detected it from the start. He was conected by HDMI and tried to conected it on VGA . It worked for a minute. Then it gave us another error and again it wasn't being detected. The monitor don't works from the moment you get on the computer so we can't even acess to BIOS or something else.
We even tried to conect the pc on another monitor but is the same.

I've seen a lot of people having troubles with 2 monitors, but we only use 1.

Does anyone knows something about this? We think it may be an error on the monitor's resolution. But we can't try to change it.

Thank you everyone

:)

 

Windows 10 doesn't recognize my Viewsonic VA712b monitor.

No errors, monitor wasn't detected, no manufacturer updates. Before Windows 10 upgrade both monitors worked fine. After upgrade to Windows 10, too many programs and equipment no longer worked. Rolled back to Windows 8.1 reluctantly. Everything else
but my 2nd monitor is now working. What happened that my monitor is not recognized?

 

How to Install Windows 10 on Devices with Limited Space

Even though I have an external device with more than 40 Gb capacity and the assistant recognizes it, it still keeps asking me to free 5 more Gb from the (unit C.

I have 3'62 Gb free memory in (Unit C. It asks me to free 5'63 Gb more. That'll make a total of 9'25 GB. The assistant needs 9'80 GB free memory to update windows 10 without any external device. Does this mean that my external device will only be used
for 0'55 GB? Please I don't understant anything. I just want my laptop to work. I'd stay with my actual version but it keeps showing me ads, interrupting my work and deleting random stuff because of uninterruptible random updates. It has already freed 3 GB
and I dont even know where from.

Thank you.