my desktop wallpaper went black what I do

one day, I turned on my computer laptop is dell inspiron 5010 and then I saw my desktop background was black and it does not change until everything was ok and I got a great picture on my desk.

Looks like you may have a virus or other malware. Get your updated antivirus program and start safe mode.  Note that some viruses can hide from your normal antivirus program, so you really need to scan mode without failure.  To enter in Safe Mode when you turn on first, press F8 on every seconds until you get the menu, and then select Safe Mode.  Then run a complete system scan.
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Microsoft has suggestions and offerings to
http://Windows.Microsoft.com/en-us/Windows7/how-do-I-remove-a-computer-virus
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Moderator Forum Keith has a few suggestions along this line to
http://answers.Microsoft.com/en-us/Windows/Forum/Windows_7-performance/Windows-Explorer-has-stopped-working/6ab02526-5071-4DCC-895F-d90202bad8b3
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If that suits him fine. If this is not the case, use system restore to go back to an earlier date at the beginning of the problem.  To run system restore, click Start-> programs-> Accessories-> System Tools-> system restore.  Click on the box that says show more restore points.
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You can check the corrupted system files.  Open an administrator command prompt and run SFC if the above does not help. Click START, and then type CMD in the search box, right-click on CMD. EXE, then click on run as administrator. Then from the command prompt, type sfc/scannow.
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Finally if all else fails, you can look at the rather cryptic system event log.  To make, click Start-> Control Panel-> administration-> event viewer tools.  Once in Event Viewer system log-click and scroll entries looking for these "error" with indicator see if you can find guidance on where the problem may be.
`
When you get your system in good working condition, I invite you to back up your system up to an external hard drive and it puts regular periodic updates.
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I hope this helps.  Good luck.

Tags: Windows

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