Quote from: qasimilyas99 on July 04, 2017, 12:19:44 PM

My bitcoin core is Reindexing blocks on disk, Problem is it's already took 2 days while 8 years to 4 years covered in 9 hours, Please also suggest me that how can i prevent bitcoin core to Reindexing blocks on disk, Thank You.

Scan your pc & mac for malware problems. Drivers can be also sometimes problem. If necessary update please. Hardware tools for example ram also causes issues. Power settings also cause instability and so crashed dbs. There are actually many things you can do.

To speed up close other processes or programs not necessary and let alone pc-mac handles bitcoin-qt. increase ram settings within the qt and give high priority for the bitcoin process. You can do this from Task Manager.

Generally to speak better to use SSD disks for faster processes.
Make a Disk Optimize and then start use bitcoin qt all will benefit for you. Stable PC-mac leads to lesser crashes.