Why does Win7 sound louder or smaller?

Many friends talked with Xiaobian. When watching a movie, from time to time, I feel that the sound of the film is too big and small, it sounds like a computer cold. Reinstalling the system is also useless. In fact, this is not a system problem, but a user-friendly design of Win7. Once your QQ or Fetion sends a tone, the system will automatically lower the current volume to remind the user. If you don't like this function, you can modify it by the following methods: The most strange of the most common Win7 system fault tips six ▲ Win 7 sound settings 1. Still use the search box, type "sound" sound 2. In the "sound" sound In the dialog box, select the “Communication tab. ” "When Windows detects communication activity, the default setting value" is to reduce the volume of other sounds by 80%. "Do not perform any operations", save it. Six, Win7 thumbnail chaos, see how I share the best rejuvenation In Win7 browsing picture files, sometimes there will be a phenomenon of thumbnail display abnormality, which is usually cache file at play, we can complete the repair by rebuilding the cache method. (1) Method 1 The most common and most common Win7 system failure tips 6 ▲ Clean up the system file Use the search box to type "Disk Cleanup", select the system drive letter, and select "<; ; thumbnails & rdquo; options, confirm the deletion, you can complete. (2) Method 2 The most common and most common Win7 system failure tips are six. ▲ *.db file deletion Type the address in the address bar: %USERPROFILE%\\AppData\\Local\\Microsoft\\Windows\\Explorer folder has four *. Db files, delete them all, so that the repair is complete. Thumbcache_32.db thumbcache_96.db thumbcache_256.db thumbcache_1024.db