Get your antivirus program up to date and boot into Safe Mode. Note that some viruses can hide themselves from your antivirus program in normal mode, so you really need to scan in Safe Mode. To get into Safe Mode when you first power up, hit F8 about once a second until you get the menu and select Safe Mode. Then run a full system scan.
Microsoft has suggestions and offerings at
MS forum moderator Keith has some suggestions along this line at
If that fixes it, fine. If not, use System Restore to go back to a date prior to the beginning of the problem. To run System Restore, click Start -> Programs -> Accessories -> System Tools -> System Restore. Click the box that says Show more restore points.
You can check for corrupted system files. Open an administrator command prompt and run SFC if the above doesn't help. Click START, then type CMD in the search box, right-click CMD.EXE and click Run as administrator. Then from the command prompt type sfc /scannow.
Finally if all else fails, you can check the rather cryptic system event log. To do that click Start -> Control Panel -> Administrative Tools -> Event Viewer. Once in Event Viewer click on the system log and scroll through the entries looking for those flagged "error" to see if you can find hints as to where the problem could be.
When you get your system back in good working order, I urge you to back your system up to an external hard drive and make regular periodic updates to it.
I hope this helps. Good luck.
For about a week now, there has been a macsnap.net full page pop up behind any browser I use. I am running windows 7, 64 bit on an HP computer. I have run spyware, malware and rootkit removal tools with no success. No one seems to know where this comes from and there is nothing to get rid of it yet. there is a macsnap blog on Facebook whose postings are the exact pages that pop up. I have started noticing comments on some of the pages, which repeat at times, and know that others have picked this up too and on various browsers and OS. None of us are happy about this. It does not matter what site you are on and it does not start consistently-I went a half day without any and thought one of my tools removed it. I was on the same sites I always use but then it started up again.
Have checked my browsers for add-ons etc. and found nothing. The page seems to do nothing except pop up but if not closed, you can end up with multiple pages all stacked up. Even if I were a mac user I would not want this uninvited page always intruding. Please help! thanks.