Useful programs in Canon printer ?

Here I have several programs which appear useless and which take place on my hard drive. Then already that my computer does not row badly (less than before since disinfection).

For example I have of a printer “gun”. There are various programs concerning this.

Do I have all to keep?

Canon MP Navigator E.X 1.0 65,76 Mb
Canon MP210 series
Canon My Printer 2,14 Mb
Canon PhotoRecord 80,50 Mb
Canon PIXMA ip1500 18,00 Mb
Canon Utilities Easy-PhotoPrint EX 208,00 Mb

But if I remove these some programs, it is not necessary that harms the good performance of the printer, because I need some. But is this really useful all to keep?

Thank you.

My computer has 224 Mb of RAM.

How to make so that my PC goes more quickly because I am sure that it is due to the lack of place in the hard drive. Because my computer is not infected any more and I have “Antivir”, therefore normally it should be protected well.

When I want to pass from one page to the other, it is sometimes very slow.

Local disc: Free space ------17,3 Gb
Cut total---------38,2 Gb

Partitions:
C: (NTFS) 39197 Mb (17751 free Mb)

Is this quite sufficient to make function Windows XP?

Personally, my Windows xp has already to turn down during 1 month with many Gb of free space on the disc C thus I believe that 17.3Gb does sufficiently work.

To control if my computer is infected, can I make the operation with HijackThis and thus remove the infections?