Black box appears and disappears after installation of windows 10

[debbear74]

A black box appears and quickly disappears while I am online, after installing windows 10. It appears on the left side of my screen. It causes sites that I am on to close, and will also make the things I am typing disappear. I would appreciate any help you might give me to correct this problem.

 

[Trouble]

Sounds to me like something like a hijacker or other piece of malware or virus.
Scan you machine.

These are the programs I use to generally delouse a computer with virus and or malware issues.
ADWcleaner from here http://www.bleepingcomputer.com/download/adwcleaner/dl/125/
JRT (Junkware Removal Tool) from here http://www.bleepingcomputer.com/download/junkware-removal-tool/dl/131/
Norton Power Eraser from here https://security.symantec.com/nbrt/npe.aspx
Malwarebytes from here http://www.malwarebytes.org/mwb-download/confirm/
Ccleaner from here http://www.piriform.com/ccleaner/download/standard
TFC.exe (Temporary Files Cleaner) from here http://www.geekstogo.com/forum/files/file/187-tfc-temp-file-cleaner-by-oldtimer/
ESET Online Scanner from here http://www.eset.com/us/online-scanner/

Eset online scanner is a bit different than the others in that you need to either use
IE or download and run their smart installer if you're using another browser. Then tick
the radio button that says "Enable detection of potentiall unwanted application"
Then click the link that says "Advanced settings", then check all the boxes except the
one that mentions "Use custom proxy settings", unless of course you're using a Proxy
Server. Then just click "Start", it will do a thorough system scan so it takes a long
time.

I don't check the links above everyday, so if you have any problem with any one of them then just Google for the program name but use the site names that I have recommended since I'm relatively certain they are free of extraneous garbage.