felt dumb again

I did something wrong in the lab today. :(
it was a mistake that a person with 'common sense' shouldn't make!
i pippetted 850uL of water into the mixture instead of the 85uL that i need in a staining process. my supervisor found out about that after 45 mins of heating the mixture in 37C
so had to redo the thing. hope it wont affect the staining. so much effort had been put in to do the dissection, staining, overnight staining...

and yday, i had to ask my supervisor to show me how to calculate the volume i need to make up a solution. felt so dumb abt this! i learned it in first year uni. and now i've graduated from my ugrad. i should know how to do it! >.<
well, i learned from my mistakes.

and finally, i got my new cpu and everything's up and running. can online liao.
BUT i'm using a chinese version winXP that i managed to borrow from a fren.
so i'm looking for an english version winXP so i have to unistall and reinstall it again.
i guess i shouldn't pick on whether the version i'm using is genuine or not? but imitated version restricts me from upgrading my software.
but then i'm not sure if i'm able to activate and upgrade stuff when i'm using a genuine cd since the owner of that cd had installed it into his/her own comp.