Fujitsu esprimo v5535 boot up and keyboard failure

Try Safe Mode. Press F8 key during bootup and you will be presented with a black screen with multiple choices. Select "Safe Mode". This will load Windows with minimal drivers and with admin login option. If you can log in as administrator then create a new account in the Control Panel. Restart the computer and shut down. If it shuts down correctly then you are half way there, windows OS is not to badly corrupted. Boot up and if it comes up normally select the new profile you created.

If this does not work, then you will have to repair the system files, for which you will need a OS CD or restore disk.