16-Bit MS-DOS Subsystem

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I just left my PC Online, (As I always do...) When I came back from school this darned error is everywhere saying
16 bit MS-DOS Subsystem
C:\WINDOWS\system32\psexec.exe
The NTVDM CPU has encountered an illegal instruction
CS:0db9 IP:0114 OP:65 3e 63 78 7a Choose 'Close' to terminate the application

and it wont stop.....I get about 200 of these things in 5 mins.. so its spamming like hell..
I did a reboot on my pc but it just had different files and still ended with spamming of the psexec.exe error. FIrst i got these
16 bit MS-DOS Subsystem
C:\WINDOWS\system32\Down.exe
The NTVDM CPU has encountered an illegal instruction

then
16 bit MS-DOS Subsystem
C:\WINDOWS\system32\Nogui.exe
The NTVDM CPU has encountered an illegal instruction
then
16 bit MS-DOS Subsystem
C:\WINDOWS\system32\BindF.exe
The NTVDM CPU has encountered an illegal instruction
and Finally Spams
16 bit MS-DOS Subsystem
C:\WINDOWS\system32\psexec.exe
The NTVDM CPU has encountered an illegal instruction
So my Process Memory is getting taken up by just these errors.

Can anyone help me get rid of this error w/o the reformatting solution..
 
I scanned with Spybot and AVG and the errors seemed to slow down but....its still is appearing but like every 20 secsnow.
 
the errors....they returned after all this time....and its spamming like...annoying...can anyone please help me fix this? Same details as the one above...
 
You have some serious malware infection. Please see our security forums for preliminary scanning and removal instructions.
 
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