SemiLiveMusic,
When computer slows down over the time it might be sign of:
- virus/trojan/rootkit activity, or
- hardware problem (usually with hard disc and then computer slows down because it is used constantly for swap files etc.)
- dust blocking air-flow (specific for some notebook models due to a poor design) when CPU slow down because of detected overheating
- lots of programs installed in SysTray (started during boot-up) or lots of active programs that 'eat' all of the RAM memory so disk get used to often
Let's assume that it's virus (or something similar) in Your case. You might try installing ComboFix (can be found on
www.bleepingcomputer.com) and let him do the job. It takes about 15 to 30 minutes depending on the hard disk occupancy, and number of rootkits (nasty 'bugs' that often pass by anti-virus programs and 'infect' PC deeply) detected.
As for the disk replacement, it's fairly easy, although I'm IT specialist for a long time so it might seem too easy for me, and to hard for You. :-)
Hard disk replacing is as easy as:
- unscrewing the screw on the HDD bay door (usually) on the back of the laptop
- pulling flexible plastic (there is even arrow in the direction of disconnecting) connected to the light aluminum frame around hard disk (this actually unplug the hard disc connector from notebook motherboard)
- unscrewing two or four small screws to remove the hard disc from the frame
- put the new hard disc into the frame and repeating procedure backwards
:-)
After physical exchange of the disc, You have to:
- reinstall operating system
- reinstall all the drivers (usually located on Recovery or Install disc of Your notebook)
- reinstall all the application You use
- copying back all user files previously backed up to the external disc: user files (usually at locations of My Documents, Desktop, or some other), e-mails (if You use Outlook or other e-mail program), Favourites, etc.
This might be long, tedious and intimidating process, but I prefer this to using some specialized program for data migration
(usually used to migrate all Your data from one PC to another one).
Also, if you use program that copies your Registry file (in order to 'transfer' all user applications without reinstalling them) You will most likely transfer the part or whole rootkit to
Your new disc.
Another benefit of the upper procedure is the fact that Your laptop will work much faster because You will not reinstall bunch of small (or bigger) programs You installed at some time in the past but You are not using it at all).
But there is also possibility that You forget to install some program, or worst, you loose installation disk.
Anyway, first try ComboFix procedure, and after decide what to do.
P.S. Sorry for the size of the post, but I tried to explain everything and format it for easy reading.
Good luck.