Broni seems friendly and caring with that small bear and smiley, it's a nice touch that your in good hands
Just to let you know there are two sleep modes - one under Windows and one under your BIOS. These two can fight each other if both on, some devices can have issues waking. If your computer does sleep 'hiberate' make sure you wake it up first before shutting down (ensure shutdown safely each time). It's easy to not know if your computer is sleeping and switch off at the wall, etc, which would cause errors on the next startup.
If sleep mode isn't the issue, are your using a Virus Scanner? If so, which brand and version? Have you checked if it's compatible with Win7?