Error: The parameter is incorrect (87)

[REDACTED]

Starting after Avast found a virus on my PC and quarantined all instances of it, when I now do a Quick Scan, at the end it presents a box containing this message: "Disk\\?\...{+} Boot Record  Error: The parameter is incorrect (87)". It's not described by Avast as malware, but a file that could not be scanned. Instead of the usual options to quarantine or delete, I only have a Close button and a ? button. The ? button takes me to Avast help, where there is no mention of this message, so it's useless.

What does this mean? The computer appears to run perfectly, neither Avast nor Malwarebytes nor ESET online scanner find anything on the computer and there's no indication anything is wrong with the Boot Record (boots and runs as it always has).

[Eddy]

Run chkdsk on that system and let us know if it solved it or not.

[REDACTED]

Ran chkdsk on the DATA drive (E:), but it would not run on C:. . . I think because my C: is a Samsung SSD. In any case, I ran Avast Quick Scan again, and the same message came up.

[Pondus]

   Starting after Avast found a virus on my PC and quarantined all instances of it,   

What file did avast detect ..... full file path?
What malware name was given?

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Although I said I could not run chkdsk on my SSD, apparently it DOES run; it just doesn't put anything on the screen like I'm used to with an HDD. But after running cmd, entering "chkdsk /f" while the path is C:, then rebooting, the screen goes black for a minute or so, after which Windows loads. Chkdsk on a SSD, of course runs VERY fast -- so fast it probably can't put anything on screen. In any case, after doing chkdsks on both the SSD and HDD, then running Avast Quick Scan, the same message appears.

[REDACTED]

   Starting after Avast found a virus on my PC and quarantined all instances of it,   

What file did avast detect ..... full file path?
What malware name was given?

No path; just "Disk\\?{+} Boot Record" "Error: The parameter is incorrect (87)". And per my original post, it's not described by Avast as malware; just a file that could not be scanned.

[Pondus]

I am talking about the virus you say avast found and quarantined ..... as your first post start with

[REDACTED]

   Starting after Avast found a virus on my PC and quarantined all instances of it,   

What file did avast detect ..... full file path?
What malware name was given?

The single malware I found in all of the 258 line items in the quarantine chest is VBS:Agent-ACW [Trj]. The path to 98% of them was C:\Users\Donald\AppData\Local\Microsoft\WindowsLive Mail\Personal\Inbox (or) Sent Items (or) Storage Folders. The last 5 items were:

adblock plus  C:\Users\Donald\AppData\Local\Google\Chrome\User Data\Default\Extensions\cfhdojbkjhnklbpkdaibdccddilifddb\1.8.3.0\lib
dds.scr  C:\Users\Downloads
INTLBAND.HTM  C:\ProgramFiles (x86)\Microsoft Office\Office
prefs.js  C:\Users\Donald\AppData\Roaming\Thunderbird\Profiles\us630.rev.default
StructuredQuerySchema.bin  C:\Users\Donald\AppData\Local\Microsoft\Windows\1033

[Pondus]

follow instructions  https://forum.avast.com/index.php?topic=53253.0
attach Malwarebytes / Farbar Recovery Scan Tool / aswMBR logs

when done a malware removal team will be notified, and somone will check your logs

[REDACTED]

follow instructions  https://forum.avast.com/index.php?topic=53253.0
attach Malwarebytes / Farbar Recovery Scan Tool / aswMBR logs

when done a malware removal team will be notified, and somone will check your logs

OK. Malwarebytes was already set to scan for rootkits, and found none.

Downloaded Farbar Recovery Scan tool, ran both and have attached their output.

Installed aswmbr, ran and have attached its log.

[essexboy]

MBR is good, as avast cannot scan it, it does not mean it is a problem

[REDACTED]

MBR is good, as avast cannot scan it, it does not mean it is a problem

Actually it cannot scan it; that what the message says: "SOME FILES COULD NOT BE SCANNED", under which it has what looks like a paper folder tab that says "Warnings". It would be better if I could attach a screen dump, but this forum only allows text or direct picture files (.jpg, .gif, .png) as attachments and I have no idea how to save a screen dump in those formats.

[essexboy]

You mean like this ? 

Files that cannot be scanned is just that it is not bad, in my case it is my skydrive files as I was offline at the time

[REDACTED]

You mean like this ? 

Files that cannot be scanned is just that it is not bad, in my case it is my skydrive files as I was offline at the time

Yes, except it mentions only one item.

[essexboy]

What item is it showing ?