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Go into system, find the wi-fi adapter and open it up. Choose uninstall and click on it. If windows asks you if you want to remove the software from the hard drive say no. Wait for uninstall to complete than shut down the computer, shut down, not reboot. Wait a couple of minutes than turn it back on, sign in and let windows find and reinstall the driver. It now should work. 9 times out of 10 this corrects this issue.
Try to boot you computer to safemode, turn off computer then turn it back on then keep on tapping F8, then choose safemode, if youre able to boot to safemode, do system restore going back to the time that its properly working, click start > all programs > accesories> system tools > system restore then pick a date when you think that its properly working..
If its not able to boot to safemode, you will need to reinstall the operating system using the recovery disc that came with the computer.
You can try safemode by Tapping F8 when the system turns on
if the system boots into the Safemode try System Restore
2. All Programs
5. System Restore
6. Select a Date which the system worked fine
Tap F8 try Last Know Good Configuration
if it did not help
Try re-installing the Operating system
Steps to Re-Install OS
At the Acer splash screen, you can press Alt and F10 to bring up a DOS style version of eRecovery. The unit is able to reload Windows from this mode faster then from CD. If the hard drive is replaced the system loses its eRecovery features. These features are on the hard drive and cannot be reinstalled
to access that mode, shutdown the computer completely and after 20 secs turn in on again, as soon as you see the dell screen immediately strike F8 key continuously, if that is successful you should be at the advance menu options. use your arrow keys to choose and highlight safemode w/ networking and hit enter. if you see your operating system after just hit enter again.
once at safemode try to pull up internet explorer if still this doesnt work, go to the contol panel click internet options if your in classic view but if not click network connections first then click internet options. click the advance tab, that should be at the least right hand side, click reset which is under restore advance settings.
if your using IE8 at windows XP operating system, try uninstalling the IE8, to do that try the instructions below.
click control panel
click add/remove program
find and click the IE8 then click uninstall or remove
then restart the computer
if still doesnt work try to install a different browser like mozilla firefox, google chrome or maxthon
and if still doesnt work then try to reinstall the operating system back to factory settings.
Try accessing safemode or safemode with networking, if you're able to access safemode or safemode with networking without having the same problem disable start up items and services of your computer and if your able to access safemode that only means that one of the software in your start up item is causing the problem and if you're not able to access it run the hardware diagnostic of your computer ( if that's a dell you'll need to access it in f12 ) if the test passed without any errors you'll need to reinstall your operating system but if it fails then it give you an error contact tech support of dell give them error they tell you what you need to replace. By the way if your just gonna end up reinstalling your operating system, BACK UP your files first before doing so.
power on the computer, immediatly tap f8 until you get to the boot menu. Choose "last known good configuration". If this fails, your master boot record is corrupt.Boot into safemode, copy all of your data to an external hard drive, then reload your operating system from the secondary partition on your hard drive or insert your OS restore disk and follow the directions.
Try booting to safemode. and delete it from there.
To boot to safemode, restart your computer and tap F8 once your computer starts booting up again. on windows advanced options menu select safe mode then hit enter. hit enter again if it asks you for the operating system.
If you still can't delete the file try to download MoveonBoot here.
Just install the program. once it's installed right click on the file you wish to delete and select the option to delete on next boot.