|mmm Be careful - before you go down that road…|
What model Aspire do you have; and also confirm the installed OS.
What applications/programmes are you having trouble installing,
Before you go anywhere near a Reset to factory status - first ensure "all" your personal files (the "stuff I wouldn't wish to lose") are safe "off" the system as it is now. Copy them to external media - typically DVD; but also to an external HD is nice too.
Then consider more carefully/fully your need to reset etc.?
Remember - factory reset will erase all your personal files…; which is why to safe-guard them first...!