I have a problem with my computer. Several internet pages I visit do flash(ocasionaly a big black square appers at the bottom of page for miliseconds). It started with Sketchup 8 flashing when I opened a window in front of it.(I though it was just an incompability issues), but now it also does this with websites like Jul or GBAatemp. Please note GBAtemp started flashing just today, it was working fine yesterday even though Jul was flashing yesterday already. Also, one page completely blacked my monitor and I had to minimize or close it to get rid of that black screen. I'm not even sure if this is virus or just program incompability, but I recently seen strange processes in task manager like InstallAgent.exe or Opera things (I have opera installed on my computer but I dont use it)(edit: they don't appear anymore). If I indeed have virus how can I get rid of it? I don't want to register to any other forum because I want help ASAP. No adware started to appear. At least that I don't have a bank account or any important stuff on my PC(my PC is more gaming based than work based though its specs are not very good). My antivirus doesn't detect anything. Please help me, preferably without having to reinstall Windows (I use Windows 10)
(Don't ask about progress in my hack BTW. It's on hiatus or whatever you people call it.)
There's no need of screenshots.
Just imagine a completely black square covering bottom half of a program(or a web page) for miliseconds, then disappearing, then appearing again and repeating this until I close said program or web page.
I suspect this has something to do with some color that is on screen, because this flashing happens almost everywhere now: Programs, web pages, Project64 games, etc.