my system got too much slow now a days...?

[Zaigham]

I'm using Hp mini laptop with window 7. But from a month my system got too much slow. As it takes enough time to boot and also decrease internet speed like while using this Facebook it browse down too much slow and sometime act like its hanged and then move fast like jerks. and also its take almsot time to open new programs. And explorer sometimes automatically shoutdown and restart then. I guess there are to much software are installed in my pc. I was thinking to restore my pc but afraid of my data losing. And don know how to use windows backup. And my Hp quick web also crypted. I am very much tense about these problems. Do i have to restore? If yes then how to save data as I have only two drives in my pc c and d. In d there is only windows backup and then in c my all data is.
all data which i really have to shift is almost 100+ gb so can't transfer it in to portable device fully. And i weekly update my antivirus and scan my pc.

[Tang]

If you're worried about your photos, videos, music, documents etc. Just copy it to a portable drive. (Memory stick)
I'm not sure about games. If the KEY works on other computers there's nothing to worry about.
So, If this helped you and you have iTunes don't forget to de-authorize your computer.
If its just softwares don't worry you can download them later.
If this didn't helped you than just uninstall unwanted programs and run a full scan with your anti-virus software. Maybe there are lot of virus/malwares they can harm your computer real bad. I had heard that there's a setting where you can speed your computer or slow it down. On registry key maybe a program changed it but never mind. Just run a full scan and uninstall unwanted programs

[Apple]

If you are afraid of data lose, you can backup your data by data backup software: http://www.aomeitech.com/

[Tex]

Do 2 things
1. Scan find and remove spyware and viruses. Go to site below and go to free stuff area that will help you
2. See video below also