This post is for those whose computer is not able to boot safe mode.
In most of the cases, when Windows refuse to boot, the reason is driver conflicts. This can happen if you have installed a new driver, altered an existing driver or incorrectly configured a device. A virus may also cause a driver conflict by corrupting driver files.
First of all, disconnect all non-default peripherals connected to your computer. I highly recommend that you only keep monitor/LCD, mouse and keyboard connected to your computer. You can connect speakers as well.
Now start your computer and when the BIOS screen passes, press F8 repeatedly till Windows Startup options appear. Select ‘safe mode’ to boot into ‘safe mode’.
If this succeeds and your computer boots up, then it means that there is a hardware conflict or maybe a virus problem. Now, go to Start>Run and type 'msconfig', press OK. Make sure that General tab is selected. If you're using your computer since long time and if you have been using a lot of softwares, then 'Selective Startup' radio button should be checked. ‘Selective startup’ means that along with usual windows programs, selected installed applications (which did not came default with windows) are launched. So, now go ahead and check the 'Diagnostic Startup' radio button. This loads basic drivers required during windows boot. If there's a software or external hardware conflict then this should work. Press OK and restart your computer. This time, do not press any button and if everything was good, then your windows should start automatically. Good Luck!
If this does not work, then please refer to Part 2 of this post.
