When I double click on My Computer or try and open My Documents I get the following message



"Data Execution Prevention- Microsoft Windows"

To help protect your computer , Window has closed this program

Windows Explorer


Anyone know why this is happening?

The most likely cause would (IMO) be malware (viruses or spyware). I'd suggest trying a few of these free, online scans to ensure that nothing has slipped by your protection software:

Be advised that some of these scanners will pickup things in "quarantine" from other anti-virus programs - so review the results carefully:

http://housecall.trendmicro.com
http://www.pandasecurity.com/homeusers/solutions/activescan/
http://www.kaspersky.com/virusscanner
http://www.bitdefender.com/scan8/ie.html
http://support.f-secure.com/enu/home/ols.shtml
http://us.mcafee.com/root/mfs/default.asp
http://onlinescan.avast.com/
http://ca.com/us/securityadvisor/virusinfo/scan.aspx
http://www.eset.com/onlinescan/

<links compiled on 02/14/2008>

Thanks.

Ive run a scan but found nothing. Ive now simply turned off the DIP for Explorer and everything is fine now.