How to set my conputer to am earlier setting?

You can perform a 'System Restore'. So that you can restore your system to an earlier date. The option should be available under "Programs == Accessories == System Tools == System Restore".

The only advice I can give you is to consider all possibilities before doing a system restore. If you ca delete the junk that you want but still keep your recent files, I’d say go for the cleaning utilities rather than doing it by system restore. If you do system restore without backing up your recent files, those will be deleted also.

For me, I would definitely choose manual uninstalling over system restore because by this option I would be able to select programs I am sure to delete while in system restore there might be programs I need that wasn't installed previously. If you are afraid of uninstalling the wrong application or software then just choose those that you are sure about. After uninstalling all the programs you believe you do not need, you can now try out other programs installed and see if you need them, and if you think you don't then simply uninstall them. It does take long but it is well worth it. I would also suggest using the software CCleaner. Good luck!

Though anything is possible with computers, I have never had a problem with uninstalling programs. If we can install them we can easily uninstall them. You will however sometimes get a halt in the process with a message that asks you if you want to also keep a particular file. I suggest keeping any files that pop up like that because they are usually very small anyway and some are what are referred to as shared files. It is just good policy to keep them. Other than that uninstalling programs goes very well. They suggest to turn off non nessassay programs when doing maintenance. If after an uninstall something is left behind like an icon on the desktop just toss into the garbage/recycle bin. Done.