Hello there, welcome to Seven Forums.
I wouldn't uninstall anything just yet, take your time & see what you like and use on a daily basis.
As for programs to install, here's a list of useful freeware for Windows 7:
free great programs for windows 7.
Just a couple of my suggestions:
battery care (optimize the usage and performance of the laptop battery),
defraggler (one of the best defrag programs),
fences(organizes your desktop & can hide your icons when not in use),
imgburn(a lightweight CD / DVD / HD DVD / Blu-ray burning application),
macrium(disk imaging solution - if you wont use Windows Back Up/Imaging),
malwarebytes(this one is a must - on demand scanner which helps keep your computer safe from becoming infected with viruses, worms, trojans, rootkits, dialers, spyware, and malware),
Nitro PDF reader(lightweight & fast PDF reader),
Panda USB vaccine(blocks malware spreading through USB drives),
Revo Uninstaller(the best uninstaller),
RocketDock or
ObjectDock or
Nexus(launcher dock station for your desktop),
utorrent(torrent client program used for file sharing),
virtual-clonedrive(a virtual drive for mounting ISO files),
VLC player (one of the best media players, which doesn't need any extra codecs),
Winamp(mp3 player),
I don't want to overwhelm you, but you might want to make back ups of your system, in case of trouble:
backup complete computer - create image backup.