Apps won't install (silently fail after 100% downloaded) I have a problem with installing apps from Google Play onto my Samsung Galaxy S Plus phone.

It has Android 2.3.6. Yesterday I tried to download some apps. When I clicked 'Install', the app began to download but when it got to 100% it just disappeared and silently failed to install on my phone :\

I don't have an SD card and up to now I saved all my apps on the phone
and had no problems like this.
It seems to be some settings problem, but I don't know what to do.
any ideas?!
Someone already solved this without rooting the phone by uninstalling updates for Google Play Store app: Go to Settings &rarr; Applications &rarr; All (tab), scroll down and tap "Google Play Store", then "Uninstall updates".

Source: SamsungGalaxyForums