Spoolsv.exe Error With Sound And Wifi Network

i use the standard win7 wi-fi connection manager. when i launch the system, the wi-fi card gets connected to the router and i can browse the internet. however, the icon of the manager shows the signal strength bars with a blue circle (the circle that indicates loading sth everywhere else in windows) which usually tells me that it is still connecting to the network. the circle doesn't spin, it's just stuck. clicking on the icon doesn't bring up the available network list, so it just doesn't respond.also, the system cannot play sounds. well, it surely cannot play sound from the internet, like grooveshark or Internet. music on grooveshark doesn't even start, Internet videos go silent. actually i haven't tested if it cannot play sth e.g. from itunes, but one time when i wanted to restart the computer short after startup, it showed that explorer is not responding, with the task "playing the log out tune" currently being performed, so maybe the same thing with "offline" sounds...then, after some time (usually it's 10-20 minutes after the i turn on the computer) a notification window is shown telling me that a program needs my action and when i accept it, the message appears about c:windowssystem32spoolsv.exe experiencing a runtime error and requesting the runtime to terminate it, or sth like this - so just the standard spoolsv.exe error message. and then... voila! the wi-fi icon shows just plain signal strtength bars and responds to my actions, and i can play sounds.the information that i use a lexmark x4975 wi-fi printer might be of some significance. i don't remember now exactly (and don't have any way to check it) but i'm nearly sure that the situation with the printer is quite similar - before the error i can't use it, and after - i can.