Windows 10 bootable usb infected?

[pasi458]

I've been trying to clean my pc after a recent infection so i've tried Dbaning my HDDand clean installing windows... yet i keep getting a recurring virus which is taking up my disk % and slowing my pc down. So i'm wondering perhaps if the usb i install windows with is infected and if it is how did it manage to even get infected?

 

[pasi458]

I only installed the free version of AVG and Adwcleaner so nothing foreign

 

[USAFRet]

I only installed the free version of AVG and Adwcleaner so nothing foreign

This is a brand new AVG install. Downloaded direct from AVG.

Installing AVG and simply accepting the defaults, installs Google Chrome!

It said it was going to do it, you said OK, it did it.

 

[pasi458]

i made sure to unselect the google chrome installtion so yea..

 

[USAFRet]

i made sure to unselect the google chrome installtion so yea..

OK...so start over.
Monitoring at each step.

Install, deleting ALL partitions on the drive. ALL of them.
Does this chromium appear?

Install something..AVG maybe.
Does it appear?

Install Malwarebytes.
Does it appear?

Basically...test at each step to see where it happened.

If it happened from the very beginning, your install media is compromised.

 

[pasi458]

Alright will try that, thnx

 

[pasi458]

Okay deleted all my partitions did a fresh install with my new windows usb.
Installation went fine and pc was normal as usual so then i went ahead and installed avg which again caused the pc get spike up really high in disk usage and chromium appeared in my software registry..

Strangly i found some suspicious files in my windows32 folder which have been recently modified called perfh009.dat, perfstringbackup, and avgBoot which doesn't let me delete it oddly.

Also i should mention that there's a AVG Service process in the task manager which won't let me end task it

 

[USAFRet]

Okay deleted all my partitions did a fresh install with my new windows usb.
Installation went fine and pc was normal as usual so then i went ahead and installed avg which again caused the pc get spike up really high in disk usage and chromium appeared in my software registry..

Strangly i found some suspicious files in my windows32 folder which have been recently modified called perfh009.dat, perfstringbackup, and avgBoot which doesn't let me delete it oddly.

Also i should mention that there's a AVG Service process in the task manager which won't let me end task it

So Chromium only appeared after you installed AVG?
Then it would appear that the AVG install still has some Chromium gunk in there, whether you select that or deselet it.

Solution?
Use some other antivirus.

 

[pasi458]

Yea pc was completely normal prior to installing avg and no chromium aswell..
Gonna try a another antivirus thnx
Just wondering how would the avg install be corrupted if i'm downloading it from the website?

 

[USAFRet]

Yea pc was completely normal prior to installing avg and no chromium aswell..
Gonna try a another antivirus thnx
Just wondering how would the avg install be corrupted if i'm downloading it from the website?

Not 'corrupted'...that Chrome stuff is in there by design. Or sloppy programming from AVG.

 

[pasi458]

hmm, thing is the chromium thing never appeared with avg before the virus so if i use another antivirus, would the system be safe to use?

 

[USAFRet]

hmm, thing is the chromium thing never appeared with avg before the virus so if i use another antivirus, would the system be safe to use?

Scrolling back...
A virus cannot survive a DBAN of that drive.
A virus cannot survive multiple deletions of all partitions (you did this, correct?)
This Chromium only appears after the install of AVG.
The Chrome browser is a default option in the AVG install.

Either you have corrupted install files from somewhere, or AVG is carrying some of that Chrome stuff with it.

 

[pasi458]

Yep, definetely something up when i indtall avg.. Wont let me uninstall it nor cani delete it from the reigstry...
i doubt it anything external so im wondering is it a bios virus all along?