Hello, I am using a Vista laptop and IE9. Recently I have started to receive a message while browsing that a data execution prevention error has occurred and IE has had to close to protect my computer. If I re-open the browser, it continues to work properly for a while and then the same message could appear again. It can occur on any page, sometimes when I'm on Amazon, eBay or other similar sites which I wouldn't expect to cause any problems. I have googled the problem and have found a solution, but I'd like to know whether it's advisable to follow the recommendation or if I could be opening up my PC to trouble. What has been suggested on several sites is to enter the following into a command prompt running as administrator: bcdedit.exe /set {current} nx AlwaysOff I have already verified that DEP is set to "Turn on DEP for essential Windows programs and services only". If the suggestion isn't recommended, please could anyone give an alternative I could try. This laptop is four years old and has only been coming up with this problem for the last couple of months. I haven't installed any new pieces of software which I would expect to have a bearing on it. Thanks for any help. Caroline. __________ Information from ESET Smart Security, version of virus signature database 6984 (20120320) __________ The message was checked by ESET Smart Security. http://www.eset.com ** To leave the list, click on the immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq