Glitchy screen

[Farco/Ghost]

I was playing Warmer with Surgeon like 2min ago. I decided to play some music through iTunes so I decided to minimize my screen. As soon as I maximize the game after I turn the music on, this happens

Can anybody help me with this? Is it possible to fix this? Or I have to redownload WA again.

Thanks,

Farco/Gengar/Ghost

[StepS]

what is your graphic card? which mode are you using? Direct3D 9 is the best currently

[Farco/Ghost]

This has never happen to me before when I played it for the past few days. It just now happen to me whenever I minimize and maximize the game. My graphic card is Intel(R) HD Graphics 4000.

[StepS]

what renderer do you use? have you tried Direct3D 9? from your screenshot it looks like your game gets cropped to 1024x768 during the game, while the rest becomes completely transparent
also does it happen without itunes? Apple software could produce bugs
also what's your system

[Farco/Ghost]

This new laptop i5 I brought like 5 days ago is crap.
Information:
Window 8, Inter(r) Core i5-3230M CUP @ 2.60ghz  64 bitz
1) Internet speed is horrible,
2)my internet disconnects on me even though the router isn't unplugged,
3)sometimes my internet goes out on me even though I am connected.
4) Lowest speed I had is 6.5 and max is 65.

Sorry if this is off topic

When I run Speedtest.org, this the result of the new laptop: Old-Latest
http://www.speedtest.net/result/2563140650.png
http://www.speedtest.net/result/2563140650.png <-- It ran aight for a few days then drop
http://www.speedtest.net/result/2570467786.png <-- Now

The old laptop I had (i3) runs soo much better than this new laptop I have.
1) Doesn't DC on me every 15min-1hr
2) Max speed I get from it is 140

My i3 speed: http://www.speedtest.net/result/2563147075.png

[StepS]

please, can we get back to the game? yet to see the details which I am asking you for the 3rd time already.