Ok ,as the title says, my n9 refuses to install or uninstall apps.When I try to install an app, a msg pops up ''application incompatible with other installed applications" and when i try to uninstall my apps to see what application conflicts with it my N9 just says "cant install application".

Here is a list of my installed apps:
fastern9
optimizer
unrestricted system ui
inception
noteimporter
billboard
wazapp
n9Qtweak
quickedit
mp3cut
fmradio
grab radio
shotmee
whozcalling
call blocker
recorder
cutetube
translate all
fmobi
xms
flashlight
livescore n9
Firefox
..and few games

anyhelp will be appreciated especially that i dont want to go through reflashing or clearing my device