GT-S7262 restart problem solved by flash nck samsung tool
Model Selected: GT-S7262
Start Detect device.
Device detected OK: COM78
Downloading..
Get PIT for mapping..
PIT Saved to: backup\samsung_pit\GT-S7262_samsung_pit_1.pit
Firmware update start..
Loading: boot.img, wait.
Processing: boot.img
Loading: recovery.img, wait.
Processing: recovery.img
Loading: system.img, wait.
Processing: system.img
Loading: cache.img, wait.
Processing: cache.img
Loading: hidden.img, wait.
Processing: hidden.img
Resetting, wait until phone restart.
Total Time: 00:03:39
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Log saved to:
logs\GT-S7262_flash_1.txt