Change your lerp and/or gameserver.

Does this only happen in tf2 or does it happen in other games as well?

stop downloading when playing

ProSkeez - I play only TF2 so idk

tnm - Are you talking about cl_interp commands or what?

Launch TF2
Join a server where this occurs
Open console
Type in: net_graph 4
Take a screenshot
Post the screenshot here

Then we can help you.

http://images.akamai.steamusercontent.com/ugc/683775065706999475/01F315E59F464FB5342AD509908486E364A2BE91/

You got 180 ping its gonna be laggy dude, try joining a server closer to your region

your ping is 200 thats probably why

edit:ninja'd

What server are you on? Since you have 187 ping, and it seems you're from Poland, try joining some European servers, not American

your ping is very high

http://images.akamai.steamusercontent.com/ugc/683775065707439103/C67F4BAE2E4F99E5EBECA4DAAE9D3B3428E2833B/ Now Polish server, 20+ ping and no difference.

do u have vsync on

no, i have off

Could it possibly be that your monitor has bad response time?
I really have no idea man ;/

Have you changed cl_interp too high?

post a pastebin with your configs

snd_mixahead 0.05

disable aero unless you're playing in exclusive/true fullscreen mode

do what Twisted said, but make sure nothing like an rcon password is in it

my cfg :

// Disable sprays
cl_playerspraydisable 1
r_spray_lifetime 0

// Disable shadows
mat_shadowstate 0
r_shadowmaxrendered 0
r_shadowrendertotexture 0
r_shadows 0

// Disable facial features
r_eyes 0
r_flex 0
r_lod 2
r_rootlod 2
r_teeth 0

// Disable ragdolls
cl_ragdoll_fade_time 0
cl_ragdoll_forcefade 1
cl_ragdoll_physics_enable 0
g_ragdoll_fadespeed 0
g_ragdoll_lvfadespeed 0
ragdoll_sleepaftertime 0

// Disable gibs
cl_phys_props_enable 0
cl_phys_props_max 0
props_break_max_pieces 0
r_propsmaxdist 1
violence_agibs 0
violence_hgibs 0

sv_cheats 1 // Disabled at the end of this, may or may not do anything lol
cl_hud_playerclass_use_playermodel 0 // adds another hud element -3% frames
mat_phong 0 // some people don't like this on I prefer it on for sniper though
cl_muzzleflash_dlight_1st 0
cl_detaildist 0
cl_detailfade 0
cl_drawmonitors 0
cl_ejectbrass 0
cl_jiggle_bone_framerate_cutoff 0 // Turns off jigglebones
cl_new_impact_effects 0
cl_show_splashes 0
func_break_max_pieces 0
glow_outline_effect_enable 0 // Cart glow effect.
lod_transitiondist 0
mat_antialias 0
mat_bumpmap 0 // Controls bumpmapping. Setting this to 0 on dx9 will cause
// a strange `shine' effect to appear on all players. - Chris
// In the past I wasn't able to prove that disabling this was significant,
// it effects fps by about 1% after several checks - Comanglia
mat_colcorrection_disableentities 0
mat_colorcorrection 0
mat_disable_bloom 1
mat_disable_fancy_blending 1
mat_disable_lightwarp 1
mat_envmapsize 8
mat_envmaptgasize 8
mat_filterlightmaps 0
mat_filtertextures 0
mat_forceaniso 0
mat_hdr_level 0
mat_max_worldmesh_vertices 512
mat_monitorgamma 1.6 // Controls brightness, try 1.8 to make it brighter or 2.2
// to get it darker. Only works in fullscreen.
mat_motion_blur_enabled 0
mat_parallaxmap 0
mat_picmip 2 // Higher = more mipmapping. Without `sv_cheats 1', you're looking
// at a range from -1 to 2, -1 being the best quality, 2 being the
// worst. - Doesn't really matter much what you set this too if you're cpu bound
mat_reducefillrate 1
mat_reduceparticles 1
mat_specular 0 // Controls specularity. Setting this to 0 will make ubers
// non-shiny, and will remove some specular effects from in-game
// entities which support it. - Setting this to 0 while trilinear is off lowers framerate for reasons I don't understand
mat_trilinear 0
mat_viewportscale 0.5 // Almost no performance gain from viewport upscaling.
mat_viewportupscale 1
mat_wateroverlaysize 1
mp_decals 9 // - Just keep this below 60ish and you shouldn't notice much different at all maybe .5 average fps for every 30-40 decals
r_3dsky 0
r_ambientboost 0
r_ambientfactor 0
r_ambientmin 0
r_avglight 0
r_cheapwaterend 1
r_cheapwaterstart 1
r_decals 9
r_maxmodeldecal 9
r_decalstaticprops 0
r_decal_cullsize 15
r_drawdetailprops 0
r_drawmodeldecals 0
r_drawflecks 0
r_dynamic 0
r_flashlightdepthtexture 0
r_forcewaterleaf 1
r_lightaverage 0
r_maxnewsamples 0
r_maxsampledist 1
r_occlusion 0 // disables ambient occlusion. 2% FPS boost
r_propsmaxdist 0
r_renderoverlayfragment 0
r_staticprop_lod 4
r_waterdrawreflection 0
r_waterdrawrefraction 1
r_waterforceexpensive 0
r_waterforcereflectentities 0
r_drawtracers_firstperson 0 // should give a small fps boost in 1st person
rope_averagelight 0
rope_collide 0
rope_rendersolid 0
rope_shake 0
rope_smooth 0
rope_subdiv 0
rope_wind_dist 0
tf_particles_disable_weather 1 // Disable weather effects on maps supporting
// it, for example, setting this to `1'
// disables rain effects on *_sawmill.
tracer_extra 0
violence_ablood 0 // framerates on -most- pcs are higher with these on
violence_hblood 0

^ That's everything what i have in tf2

are you using a wireless mouse?

I have only had this problem when I was using a microsoft comfort mouse 6000, are you using one by any chance?

No

I'm using Thermaltake eSports Saphira mouse.

Is it just mouse buttons or is it mouse movement and keyboard buttons? Try a different mouse for basic troubleshooting. Windows 10 or 7 or 8?

And do you have any class specific binds? You could have something stupid like Mouse 1 set to sleep 0.5 secs for a script that doesnt work anymore.

No, i haven't any binds. I'm using Windows 7

Bind a key to +attack and see if there's a delay on that.

I thought this was a headline of an article, and Overwatch had come out early with incredible matchmaking, and TF2 was getting bashed because it still hasn't come out with MM.

Just wanted to point out I had this exact same issue today. Never had this before. I shoot and nothing happens for like 0.5 seconds and then I'm off target.

I did recently change my cl_interp to 0.031 around 2 days ago. Before this I used either 0 or 0.0152 which are basically identical to eachother. I don't think cl_interp is the issue though.

It might have to do with Steam having issues for the past 2 days or so. Steam even went down multiple times.
I also have tiny game freezes every couple of seconds. Didn't have that issue until Steam was having so many issues as of late. I assume Steam is to blame and the issues will persist until they fix whatever's wrong.

I'll test my old interp again tomorrow if Steam is still messed up and see if that fixes it. If not Steam is definitely to blame here