[warezjack]

Hey, I am running Lumia cyan update with preview for developer and it is all set with new features released by Microsoft but my Lumia 520 is getting very slow to load. Anyone having this problem without denim update? Will denim speed my phone? What will happen when windows 10 is load on lower end devices?

[Pete]

Sounds like you simply need a soft reset to restore decent performance.

Press and hold the volume down + power buttons together for about 20 seconds. Let go when you feel the phone buzz and the phone will restart.

See if that sorts things out for you.

[matt john2]

Is this your first time running DP version? If it is try soft reset, this may fix it. I had this problem with my 1020 when the first DP of windows phone 8.1 came out last year.

[warezjack]

I did that. But no progress. I'm really worried about next release, will it work faster or make my phone useless, no loading faster. If I open an app and then go back to start screen, all tiles goes blank. After some time, they go to normal.

[matt john2]

Then try reverting/restoring your OS back to original release(not DP) then install the DP version again, I also had the same case as you do so many times before and I had installed the DP and original version over 5 times just to make it work properly, mine was worse I had the black screen of death, unresponsive screen, overheating, battery life is only 2-3 hours in normal use. DP os version usually has many issues with it soft reset, restoring the OS should fix the problem. Good luck