'encountered problem/windows must shut down' error after reformatting

"windows has encountered a problem and will shut down in one minute"

Dell computer
Win 7 - 64bit (upgraded from XP)
core2 duo
4gb of ram

running fine for 1-2 years after win 7 upgrade until last week

this computer, used by a coworker was having issues with windows randomly without ANY notice, restarting. So I reformatted the hard drive, started entirely from scratch. Now I am back on the network with it, (win 7 64bit re-installed) and am trying to reinstall software, during the installation i get the new error and it restarts mid-installation. just happened twice in a row.

is this a hardware issue?
2 answers Last reply
More about encountered problem windows shut error reformatting
  1. Sounds like a hardware problem. You may want to check the ram and hard disk first.
  2. This message you're getting is probably an infection by malware / trojan. When you get that message, let's try this:

    Go to Start > Run > type "shutdown -a" (without quotes)

    If that stops Windows from restarting it's a software problem not hardware. If this is the case, you need to perform a full system scan and try some free tools to seek and destroy any malware:

    RootkitBuster: http://free.antivirus.com/us/rootkit-buster/index.html
    Stinger: http://www.mcafee.com/us/downloads/free-tools/stinger.a...
    SpyBot: http://www.safer-networking.org/mirrors/
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