you might be running low on system resources like low memory or virtual memory. this happens when there is too many process's running memory and office is partially loaded in memory. so office may actually be loading but may take a good while to completely load and run..
there are a number of things that can help to your system, like a computer tune up, adjusting virtual memory and even using a memory defrag to free up memory of unused process's. you can also execute office diagnostics which will repair office, if it has become corrupted.
but one of the first things is to see how office functions in safe mode's. office can be run in windows safe mode and can also be launched in normal mode with a safe mode option.
so try re-booting up in windows safe mode and see if office works ok. the next step also launches office in another safe mode. however, the reason you should reboot, as mentioned in this step, is to clear out the office process's in memory.
now, if office launches ok in windows safe mode, then reboot into normal mode and launch office in safe mode.
just hold down the ctrl key and at the same time double click any of the office icons. you will get a message to confirm this event / action.
if office does open in safe mode, then office is not corrupted. instead your system may simply be running low on system resources, as initially mentioned.
