SOS my computer is infested bad!!

Hello all, first id like to say that yes i have gone through all of the FAQ, downloaded-updated- and -run every program, most coming back with nothing results, and i am positive my computer is still massivly in the bad, I really am at the point of wanting to wipe my computer to get rid of all the crap, but i have far too many things that i cannot and do not want to back-up or try to recover. Well my computer has many issues with it and probably many virus's but the main one that bothers me the most and i cannot deal with any longer is something where out of no where i will just get disconnected from the internet, it is not a router or ISP or net connection problem as i have checked, i also have my ethernet hardwired and not wireless, as wireless couldn't perform good results for me. So i will be playing a online game or be talking on a ventrillo server ect. and i will get randomly disconnected and i cannot get connection back although it is indeed working. The only way i can get connection back is to basically spam my Maxthon quicklaunch button bringing up around 10+ instances of the internet, and sometimes it will fix the issue, if i do nothing the net will not fix, so i spam 10 internets then close group, then repeat until internet comes back up! this is insanly annoying and is terrible, i have heard of troubles like this before but no solutions. Also another issue i deal with is a disappearing cursor.. randomly my cursor would just disappear and i could not navigate anything, i temp. solved this by opening the task manager and finding a process i didn't reconize svch0st.exe and ending it, and instantaniously my cursor reappeared! I have had nothing but great interaction with everyone here at MG, and you all have helped me countless times, thank you so much in advance, and please respond if you have any input you can supply to me!

Thanks
-Chris

P.S. this thread might be a little sloppy as this is the 2nd time i wrote it, i wrote it tried to post it but the issue came up and my net was down! >.<, so i had to retype it all again, sorry for any mis-spelled words or w/e ~! typing fast ^-^