[ronnied195745]

while trying to upgrade my video card ive mistakenly deleted drivers from device manager now when i reboot the screen stays blank i have sis300 to 750 on motherboard which is the one ive deleted can anyone advise me what i should do

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Boot into safe modem and do a driver rollback

[logan312]

Boot into safe modem and do a driver rollback

[austin_o]

Hi and welcome to Geeks to Go. You should be able to boot into safe mode (windows will use a default video driver). You could try a system restore using a restore point before you deleted the driver.

To start the computer in safe mode
You should print these instructions before continuing. They will not be available after you shut your computer down in step 2.
Click Start, click Shut Down, and then, in the drop-down list, click Shut down.
In the Shut Down Windows dialog box, click Restart, and then click OK.
When you see the message Please select the operating system to start, press F8.
Use the arrow keys to highlight the appropriate safe mode option, and then press ENTER.
If you have a dual-boot or multiple-boot system, choose the installation that you need to access using the arrow keys, and then press ENTER.
Notes

In safe mode, you have access to only basic files and drivers (mouse, monitor, keyboard, mass storage, base video, default system services, and no network connections). You can choose the Safe Mode with Networking option, which loads all of the above files and drivers and the essential services and drivers to start networking, or you can choose the Safe Mode with Command Prompt option, which is exactly the same as safe mode except that a command prompt is started instead of the graphical user interface. You can also choose Last Known Good Configuration, which starts your computer using the registry information that was saved at the last shutdown.
Safe mode helps you diagnose problems. If a symptom does not reappear when you start in safe mode, you can eliminate the default settings and minimum device drivers as possible causes. If a newly added device or a changed driver is causing problems, you can use safe mode to remove the device or reverse the change.
There are circumstances where safe mode will not be able to help you, such as when Windows system files that are required to start the system are corrupted or damaged. In this case, the Recovery Console may help you.