[Q] Unable to delete Kobo (system app)

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http://forum.xda-developers.com – hi! I have a HTC One S (from Virgin Canada), rooted. I used Titanium Backup to delete some bloatware but I am unable to delete Kobo. I tried to remove it with TB, everything seems ok but after I restart my device, it's here again (like frozen: can't see it but it does appear in TB listing). 1. I'm wondering : is there other locations other than /system/app where apps can have files? I mean, if I delete all the files related to this app (/system/app + ??) it should be gone for real, right? 2nd question: if I remove system apps, is it normal that I still see them on my computer in Googl (HowTos)