Problem Sync'ing/Downloading from Google Play Android Enthusiasts

I've been having problems when trying to download apps from Google Play. I'm relatively new to the Android Scene. Whenever I try to download and install from Google Play, I get a (-101) error, telling me it couldn't be downloaded and installed. On a related note, since I can't get the apps to sync via wifi, I've been trying to sync via USB, which doesn't work well either. Doesn't even show up on my external devices. Is there anyone who can lend a hand?
Go to

Settings&gt;Apps&gt;All&gt;Google Play Store&gt;Clear Cache &amp; Clear Data
Settings&gt;Apps&gt;All&gt;Downloads&gt;Clear Cache &amp; Clear Data
Settings&gt;Apps&gt;All&gt;Download Manager&gt;Clear Cache &amp; Clear Data

If you're rooted I would suggest wiping cache &amp; dalvik-cache from your recovery.
Also you could try installing the latest version of google play application using the apk.