your computer iko na mavirusi. just install an antivirus n you will be okay. n by antivirus weka kitu ya maana na sio ile avast ya sare. weka Bitdefender trial version. do a system scan n wait for some 5 hours itoe virusi zote when done. you can purchase it ama weka a diffrent Av lakini ikuwe Av ya maana
Just go to command prompt and type the drive letter i.e D: of the flash or external hdd. press enter then type the following
-r -s -h /s /d then wait. The files will be back. Back them up. Delete shortcuts.