Your friends are misinformed. It isn't a common issue at all. The software normally allows all system features to function normally.
More likely there is bloatware from the device manufacturer that is slowing things down.
Run the Virtual Technician to see if it finds and fixes anything: http://mvt.mcafee.com/
Also run some anti-malware tools from the last link below, AdwareCleaner and MalwareBytes Free might help.
Note the instructions there on keeping the latter free of charge.
If that doesn't help, Technical Support is available free of charge by phone or online chat through the link below.
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