I do that everyday with the All-In-One-Toolbox App. It didn't help. I even went into the "Currents" app settings and unchecks the pre-load data boxes for Syncing. That did not remedy the situation either. Now it works fine  with Currents removed.
Everyday? Why everyday?  There is a tickbox in Currents settings that shuts down background sync forever.

I purchased my N7 16GB about 3 weeks ago. It has been awesome. No problems at all. 4.2 OTA update works like a charm. I really like this unit. If I had 1 quibble to make it would be that the wifi signal is not particularly strong once I get about 35 feet from my Router. My old Iphone 3GS has a better singnal. The 16GB is plenty of storage for what I use it for which is reading news, playing games and surfing the web some.  I have a great gaming rig, an Imac and a work PC. I waited until the specs for the I-pad mini came out, thought hard about what direction I wanted to go, and who's environment I wanted to be in, and Android won..Hands Down. Lastly...the sound is a bit weak. But, for $199.00 I can't complain.

Most definitely. I'm waiting until October 28th passes by so I can see what the new offers are.