add/remove programs shows blank space, help ]: Options

[xhugerific]

i'm not sure if add/remove programs is suppose to be in heree. if it isn't , i'm sorry ;/ but um yeaah ,

my computer's been running hella slow lately , like when i start it up it like starts REALLY SLOWW... &i think its cause i have a lot of programs in my computer , and just now i wanted to remove some programs , but when i opened add/remove programs this huge blank space shows instead of all the programs.
something like this:

click to enlarge

btw i have windows XP. i know , old ]: but yeah . (:

oh & i've tried system restore ,doesn't work either.

don't use any hard words on me , haha i'm not good at computer type words.

i really hope you guys could help ;/