Bloat

Keep having issues with my main windows drive (110gb) being filled up (currently 6gb spare). Using treesize I see that AppData\Local\Downloaded Installations is 29gb which is over a quarter of the drive. Is this a bunch of windows bloat that is safe to delete?

heres the Appcrash report can anyone please point whats cousing this problem black screen sound stilling playing runining on windows 7 64bit Version=1 EventType=APPCRASH EventTime=131011564930355191 ReportType=2 Consent=1 ReportIdentifier=3aba7bfd-de46-11e5-914a-f079595ef10b...