RE-install of Windows
Before you do anything, back up your drivers to a separate CD!
It gets harder and harder to find them, and many places charge to get them.
And reformatting will sometimes 'loose' the drivers or not get the correct one.
With separate CD driver storage, accessing and installing missing drivers is far easier.
Try Driver Magician Lite (freeware);
http://www.snapfiles.com/Freeware/system…
Use it to identify & back up all drivers for this BU. Always keep it with your unit.
You have to 'boot from CD', which is a setting, found in the BIOS.
From a 'cold' start-up, one of the top row keys (F1-F12) will enter the bios settings. (Many computers will have "Press F? for advanced start-up..." when booting. That may be the one for your particular computer.)
In that BIOS set-up, go to the "Boot Order" or "Boot sequence" section, and set it for the first boot device as the CD. This varies, but usually you highlight what device you want , then use arrows, (or other key) to designate it as #1.
Make sure to "Save and Exit" or your new settings will be lost. (back to default).
Insert the CD, turn off the unit, then restart.
The recovery disk menu should now come up; just select what method you want to use.
"Formatted" erases all data on the hard drive and installs a fresh Windows OS copy; "Repair Windows" only puts a fresh copy of Windows down (in theory, data is not lost).
Be prepared to spend about 3-5 hours baby sitting this process...and 3 more hours configuring your settings, browser, and so on.
Make certain to get Windows updates after re-install & before anything else.