Intel Wireless 7260 very unstable

I have had an unstable wi-fi for a long now, but just found out it's the Intel Wireless 7260 card causing this.

What I mean is that the wi-fi will drop randomly, and only rebooting fixes it (temporarily until it drops again).

I tried plugging an external wi-fi card and it worked perfectly.

How can I fix this issue with my laptop's wifi card?

Code:

afonso@afonso-ubuntu:~$ lspci | grep -i wireless
03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)

Code:

afonso@afonso-ubuntu:~$ dmesg | grep iwl | grep firmware
[   10.013116] iwlwifi 0000:03:00.0: loaded firmware version 25.17.12.0 op_mode iwlmvm
[ 2454.141227] iwlwifi 0000:03:00.0: loaded firmware version 25.17.12.0 op_mode iwlmvm
[ 2460.110637] iwlwifi 0000:03:00.0: Failed to load firmware chunk!

Code:

afonso@afonso-ubuntu:~$ lsmod | grep iw
iwlmvm                278528  0 
iwlwifi               196608  1 iwlmvm
mac80211              724992  2 rtl8187,iwlmvm
cfg80211              540672  4 iwlwifi,mac80211,rtl8187,iwlmvm

Code:

afonso@afonso-ubuntu:~$ uname -a
Linux afonso-ubuntu 3.19.0-26-generic #28-Ubuntu SMP Tue Aug 11 14:16:32 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

I appreciate any help you guys can give me!
Thanks a lot!

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Intel Wireless 7260 very unstable